🚚 Add environment foreign key (#324)

* 🚚 Add environment foreign key

* 🍱 Add migration

lnschema_core/migrations/0034_run_environment.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.5 on 2023-12-19 12:27
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("lnschema_core", "0033_alter_artifact_unique_together_artifact_n_objects_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="run",
+            name="environment",
+            field=models.ForeignKey(default=None, null=True, on_delete=django.db.models.deletion.PROTECT, related_name="environment_of", to="lnschema_core.artifact"),
+        ),
+    ]

lnschema_core/models.py

@@ -908,6 +908,11 @@ class Run(Registry):
     # generated for many different runs
     report = models.ForeignKey("Artifact", PROTECT, default=None, null=True, related_name="report_of")
     """Report of run, e.g., an html file."""
+    environment = models.ForeignKey("Artifact", PROTECT, default=None, null=True, related_name="environment_of")
+    """Computational environment for the run.
+
+    For instance, a `Dockerfile`, a docker image, a `requirements.txt`, an `environment.yml`, etc.
+    """
     is_consecutive = models.BooleanField(null=True, default=None)
     """Indicates whether code was consecutively executed. Is relevant for notebooks."""
     # input_artifacts on File